Abstract
Solubilities are reported for carbazole at 25°C in binary mixtures containing dibutyl ether and t-butylcyclohexane. Results of these measurements, combined with literature solubilities for an additional nine systems, are used to test the descriptive ability of two equations derived from the nearly ideal binary solvent model for systems containing specific solute-solvent interactions. Both the volume fraction based and mole fraction based equilibrium constant expressions can describe observed solubilities in all solvent systems studied to within an average deviation of about 2%. Numerical values of the volume fraction equilibrium constant, however, are more independent of the inert hydrocarbon cosolvent.
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